With a wye-delta starter, what does it eliminate the need for during reduced current starting?

The wye-delta starter is a method used for reducing the starting current of an induction motor by initially connecting the motor windings in a wye (Y) configuration. This connection reduces the voltage across each winding to approximately 57.7% of the line voltage, significantly reducing the starting current and enabling a smoother startup.

The need for resistors during reduced current starting is eliminated because the wye-delta starter itself provides a means to manage the starting current effectively through the changing configurations of the motor windings. When the motor is switched from wye to delta, it can leverage the higher voltage and full torque characteristics needed for normal operation after the initial start-up phase.

Using resistors for current limiting would require additional components and complexity in the system. In contrast, the wye-delta starter simplifies the process by allowing a direct transition between winding configurations, thereby avoiding the need for resistors to manage current levels during the starting period.